[artist id="501686"]Britney Spears[/artist] certainly looks fit enough to hit the road in March when her [article id="1600471"]Circus Tour[/article] kicks into high gear. The singer is flaunting her toned, buff body in newly released pictures on her Web site.

In the pics, Britney is seen in several workout getups, including a bikini top and fishnet tights, while dancing and laughing with her backup dancers.

Spears is hooking up with some old friends for the tour. Jamie King, who choreographed her 2000 tour, is working with the singer again, People.com reports. This will be her first arena tour in five years.

She'll be hitting the road with the [artist id="1841713"]Pussycat Dolls[/artist], who recently shared with MTV News [article id="1600903"]their excitement for touring with her[/article]. "Get your tickets," Ashley Roberts told MTV News when we caught up with the Dolls on the set of [article id="1603374"]their new video for "Bottle Pop."[/article] "We are actually going to be teaching the 'Bottle Pop' dance on tour, so check it out.

"Britney actually wore one of our little lingerie pieces on her Circus album," Roberts said.

"Britney wears it well, and it's always been fun to work with her," Kimberly Wyatt added. "We've done a couple shows with her, and she's always down to be a Pussycat Doll, and now we will be joining her on her tour."

"We are going to be joining the circus, so come hop along with us," Nicole Scherzinger said of the tour, which kicks off in Britney's home state of Louisiana. "Then after that, we're just going to be taking over the world, Pussycat Dolls-style, so please come out and help us do that."